.main-article {
    display: flex;
    font-size: 1.25rem;
    width: 100%;
}

@media only screen and (min-width: 700px) {
    .main-article {
        margin-top: 5%;
    }
}

@media only screen and (max-width: 700px) {
    .main-article {
        margin-top: 2%;
    }
}

@media only screen and (max-width: 700px) {
    .main-article {
        display: flex;
        flex-direction: column;
    }
}

@media only screen and (max-width: 700px) {
    .introduction {
        align-self: center;
        margin: 5vh auto;
        width: 100% !important;
    }
}

@media only screen and (max-width: 700px) {
    .introduction p {
        margin: 0 auto;
    }
}

@media only screen and (max-width: 700px) {
    .courses {
        margin: 1rem auto !important;
        width: 92%;
    }
}

.introduction {
    align-self: flex-end;
    display: flex;
    flex-direction: column;
    width: 48%;
    letter-spacing: 0.345rem;
}

.outside {
    align-self: flex-end;
    width: 52%
}

@media only screen and (max-width: 700px) {
    .outside {
        align-self: center;
        margin: 0;
        width: 100%;
    }
}

.courses {
    margin-right: -4.4%;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    z-index: 10;
}

/* .courses:hover {
    box-shadow: 0 0 11px 5px #80808052;
} */

.courses h1 {
    align-self: flex-end;
    margin-right: 1.6rem;
    padding-left: 1.25rem;
    font-size: 3.13rem;
    word-spacing: 0.9rem;
    color: #002fa7;
    letter-spacing: 0.8rem;
}

.courses span {
    margin: 0;
    font-size: 2.25rem;
    letter-spacing: 0.42rem;
}

.courses h2 {
    align-self: flex-end;
    margin-right: 1.46rem;
    margin-top: 4rem;
    font-size: 2.25rem;
    word-spacing: 0.68rem;
    letter-spacing: 0.6rem;
}

.contents {
    align-self: flex-end;
    padding-left: 9.25rem;
    margin-right: 1.6rem;
    padding-right: 0.2rem;
    font-size: 1rem;
    letter-spacing: 0.3rem;
}

.word {
    font-size: 1rem;
    color: #b3b3b3;
}

.tech {
    color: #fc9f4d;
    font-weight: 700;
    margin-top: 0.94rem;
    margin-bottom: 1rem;
}

@media only screen and (max-width: 500px) {
    .tech {
        margin-top: 1% !important;
        margin-bottom: 1.5% !important;
    }
}

.main-activity {
    margin-top: 5%;
    width: 100%;
    overflow-x: scroll;
    overflow-y: visible;
}

.main-activity img {
    box-shadow: rgba(128, 128, 128, 0.21) 0px 0px 5.4px 3px;
    height: 27rem;
}

.activity {
    display: inline-flex;
}

.activity-branch {
    display: inline-block;
    margin: 1.25rem 4.32rem;
    width: 18rem;
    height: 25.45rem;
    box-sizing: border-box;
    background-color: #808080;
}

.activity-branch1 {
    margin-left: 0;
}

.activity-branch4 {
    margin-right: 0;
}

.sub-part {
    margin-top: 0.25rem;
    margin-bottom: 1.3rem;
    margin-right: 2.2rem;
    align-self: flex-end;
    height: .2rem;
    background-color: #002fa7;
    width: 16.35rem;
}

.part {
    margin: 1rem auto;
    width: 42.4%;
    height: 0.3rem;
    text-align: center;
    background-color: #002fa7;
}

/* .photo-items {
    margin: 0 auto;
}

.items div {
    display: flex;
    margin-right: 1.4rem;
    margin-left: 1.4rem;
}

@media only screen and (max-width:900px){
    .item > article {
        font-size: 8px;
    }
}

@media only screen and (max-width:600px){
    .item > article {
        font-size: 5px;
    }
}

@media only screen and (max-width:500px){
    .item > article {
        font-size: 1px;
    }
}

.kai-fa,
.gong-g,
.zu-zhi,
.nei-wu {
    position: relative;
}

.p-gong,
.p-kai,
.p-nei,
.p-zu {
    position: absolute;
}

.kai-fa {
    width: 15.2vw;
}

.gong-g {
    width: 15.2vw;
}

.nei-wu {
    width: 15.2vw;
}

.zu-zhi {
    width: 15.2vw;
}

.kai-fa img {
    position: absolute;
    width: 15.2vw;
}

.gong-g img {
    position: absolute;
    width: 15.2vw;
}

.zu-zhi img {
    position: absolute;
    width: 15.2vw;
}

.nei-wu img {
    position: absolute;
    width: 15.2vw;
}

.p-gong {
    width: 15.2vw;
    background-color: #EFB75859;
    background-color: rgba(239, 183, 88, 0.35);
}

.p-nei {
    width: 15.2vw;
    background-color: #c3412959;
    background-color: rgba(195, 65, 41, 0.35);
}

.p-zu {
    width: 15.2vw;
    background-color: #e2d8c9;
    background-color: rgb(226, 216, 201);
}

.p-kai {
    width: 15.2vw;
    background-color: #183a5a59;
    background-color: rgba(24, 58, 90, 0.35);
}

.special-item {
    margin-top: 0 !important;
}

.items {
    column-count: 5;
    column-gap: 2.8vw;
    column-width: 15.2vw;
}

@media only screen and (max-width: 700px) {
    .items {
        column-count: 4;
        column-gap: 8vw;
        column-width: 12vw;
    }
}

@media only screen and (max-width: 520px) {
    .items {
        column-count: 3;
        column-gap: 21vw;
        column-width: 12vw;
    }
}

.item {
    position: relative;
    height: auto;
    margin-top: 1.12vw;
    margin-bottom: 1.12vw;
    margin-right: 0 !important;
    margin-left: 0 !important;
    overflow: auto;
    border-radius: 0.3125rem;
    box-shadow: 0 0 .3125rem gray;
}

.item > img {
    position: absolute;
    transition: all 1s;
    z-index: 9;
    backface-visibility: hidden;
}

.item > article {
    transition: all 1s;
}

@media only screen and (max-width:700px){
    .item > article {
        font-size: 0.1rem;
    }
}

.item:hover img {
    transform: rotateY(180deg);
}

.item:hover >article::after {
    transform: rotateY(180deg) scale(1.5);
}
*/
.wan {
    height: 20.27vw;
}

.xin {
    height: 20.27vw;

}

.chen {
    height: 20.27vw;
}

.zhi {
    height: 20.27vw;
}

.xia {
    height: 26.97vw;
}

.chang {
    height: 30.4vw;
}

.sun {
    height: 20.26vw;
}

.xu {
    height: 20.27vw;
}

.bei {
    height: 20.26vw;
}

.wang {
    height: 18vw;
}
/* 
.swang{
    height: auto;
} */

.bin {
    height: 20.34vw;
}

.yu {
    height: 27.02vw;
}

.bai {
    height: 11.41vw;
}

.tang {
    height: 15.2vw;
}

.yang {
    height: 22.01vw;
}

.ma {
    height: 15.2vw;
}

.hu {
    height: 28.28vw;
}

.kai {
    height: 20.27vw;
}

.ge {
    height: 20.27vw;
}

.tao {
    height: 20.25vw;
}

.li {
    height: 20.27vw;
}

.ying {
    height: 20.27vw;
}

.wang-fei {
    height: 18.18vw;
}

.fei {
    height: 30.4vw;
}

.wen {
    height: 27.02vw;
}

.shi {
    height: 20.27vw;
}

.wei {
    height: 15.2vw;
}

.sc {
    height: 20.29vw;
}

.gu {
    height: 20.22vw;
}

.xue {
    height: 12.49vw;
}

.hui {
    height: 20.27vw;
}
/* 
.items section {
    display: flex;
    justify-content: space-between;
    color: #ffffff;
    margin: 0.5vh;
}

@media only screen and (max-width:700px){
    .items section {
        margin: 0;
    }
}


.items section p {
    margin: 1vh;
}

@media only screen and (max-width:700px){
    .items section p {
        margin: 0;
    }
}

.items article {
    display: flex;
    flex-direction: column-reverse;
}

.item > article > section {
    font-size: 0.8rem;
} */ 

footer {
    font-size: 0.7rem;
    height: 10vh;
    margin-top: 30px;
    /* background-color: #fafafa; */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.footsup {
    padding-bottom: 0.35rem;
    width: 80%;
    text-align: center;
    border-bottom:1px solid #d6d6d6;
}

.footsub {
    padding-top: 0.35rem;
}

@media only screen and (max-width: 735px) {
    .foot {
        margin-top: 15px;
    }
}


@media only screen and (max-width: 1068px) {
    .foot {
        margin-top: 20px;
    }
}